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//
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
//
namespace Microsoft.VisualStudio.Text.Projection
{
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
/// <summary>
/// Provides information for an edit transaction on a <see cref="IProjectionBuffer"/> in which the set of source <see cref="ITrackingSpan"/> objects has changed.
/// </summary>
public class ProjectionSourceSpansChangedEventArgs : TextContentChangedEventArgs
{
private ReadOnlyCollection<ITrackingSpan> insertedSpans;
private ReadOnlyCollection<ITrackingSpan> deletedSpans;
private int spanPosition;
/// <summary>
/// Initializes a new instance of a <see cref="ProjectionSourceSpansChangedEventArgs"/>.
/// </summary>
/// <param name="beforeSnapshot">The most recent <see cref="IProjectionSnapshot"/> before the change occurred.</param>
/// <param name="afterSnapshot">The <see cref="IProjectionSnapshot"/> immediately after the change occurred.</param>
/// <param name="insertedSpans">Zero or more source spans that were inserted into the <see cref="IProjectionBuffer"/>.</param>
/// <param name="deletedSpans">Zero or more source spans that were deleted from the <see cref="IProjectionBuffer"/>.</param>
/// <param name="spanPosition">The position at which the span changes occurred.</param>
/// <param name="options">The edit options that were applied to this change.</param>
/// <param name="editTag">An arbitrary object associated with this change.</param>
/// <exception cref="ArgumentNullException">One of the parameters: <paramref name="beforeSnapshot"/>, <paramref name="afterSnapshot"/>,
/// <paramref name="insertedSpans"/>, or <paramref name="deletedSpans"/>is null.</exception>
public ProjectionSourceSpansChangedEventArgs(IProjectionSnapshot beforeSnapshot,
IProjectionSnapshot afterSnapshot,
IList<ITrackingSpan> insertedSpans,
IList<ITrackingSpan> deletedSpans,
int spanPosition,
EditOptions options,
object editTag)
: base(beforeSnapshot, afterSnapshot, options, editTag)
{
if (insertedSpans == null)
{
throw new ArgumentNullException("insertedSpans");
}
if (deletedSpans == null)
{
throw new ArgumentNullException("deletedSpans");
}
this.insertedSpans = new ReadOnlyCollection<ITrackingSpan>(insertedSpans);
this.deletedSpans = new ReadOnlyCollection<ITrackingSpan>(deletedSpans);
this.spanPosition = spanPosition;
}
/// <summary>
/// The position in the list of source spans at which the change occurred.
/// </summary>
public int SpanPosition
{
get { return this.spanPosition; }
}
/// <summary>
/// The set of source spans that were inserted into the <see cref="IProjectionBuffer"/> by this edit transaction.
/// </summary>
public ReadOnlyCollection<ITrackingSpan> InsertedSpans
{
get { return this.insertedSpans; }
}
/// <summary>
/// The set of source spans that were deleted from the <see cref="IProjectionBuffer"/> by this edit transaction.
/// </summary>
public ReadOnlyCollection<ITrackingSpan> DeletedSpans
{
get { return this.deletedSpans; }
}
/// <summary>
/// The state of the <see cref="IProjectionBuffer"/> before the change occurred.
/// </summary>
public new IProjectionSnapshot Before
{
get { return (IProjectionSnapshot)base.Before; }
}
/// <summary>
/// The state of the <see cref="IProjectionBuffer"/> after the change occurred.
/// </summary>
public new IProjectionSnapshot After
{
get { return (IProjectionSnapshot)base.After; }
}
}
}
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